[PATCH v3 12/14] media: platform: pxa_camera: add debug register access

Robert Jarzmik
2016-08-08T19:31:29Z

Add pxa_camera registers access through advanced video debugging.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
---
drivers/media/platform/soc_camera/pxa_camera.c | 57 ++++++++++++++++++++++++++
1 file changed, 57 insertions(+)

diff --git a/drivers/media/platform/soc_camera/pxa_camera.c b/drivers/media/platform/soc_camera/pxa_camera.c
index 1e15734ae287..20340489e07e 100644
--- a/drivers/media/platform/soc_camera/pxa_camera.c
+++ b/drivers/media/platform/soc_camera/pxa_camera.c
@@ -1344,6 +1344,58 @@ static int pxa_camera_check_frame(u32 width, u32 height)
(width & 0x01);
}

+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int pxac_vidioc_g_register(struct file *file, void *priv,
+ struct v4l2_dbg_register *reg)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(file);
+
+ if (reg->reg > CIBR2)
+ return -ERANGE;
+
+ reg->val = __raw_readl(pcdev->base + reg->reg);
+ reg->size = sizeof(__u32);
+ return 0;
+}
+
+static int pxac_vidioc_s_register(struct file *file, void *priv,
+ const struct v4l2_dbg_register *reg)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(file);
+
+ if (reg->reg > CIBR2)
+ return -ERANGE;
+ if (reg->size != sizeof(__u32))
+ return -EINVAL;
+ __raw_writel(reg->val, pcdev->base + reg->reg);
+ return 0;
+}
+
+static int pxac_vidioc_g_chip_info(struct file *file, void *fh,
+ struct v4l2_dbg_chip_info *chip)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(file);
+
+ switch (chip->match.type) {
+ case V4L2_CHIP_MATCH_BRIDGE:
+ if (chip->match.addr > 0)
+ return -EINVAL;
+
+ strlcpy(chip->name, "pxa-camera", sizeof(chip->name));
+ return 0;
+ case V4L2_CHIP_MATCH_SUBDEV:
+ if (chip->match.addr > 0)
+ return -EINVAL;
+
+ strlcpy(chip->name, pcdev->sensor->name, sizeof(chip->name));
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+#endif
+
static int pxac_vidioc_enum_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_fmtdesc *f)
{
@@ -1594,6 +1646,11 @@ static const struct v4l2_ioctl_ops pxa_camera_ioctl_ops = {
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .vidioc_g_register = pxac_vidioc_g_register,
+ .vidioc_s_register = pxac_vidioc_s_register,
+ .vidioc_g_chip_info = pxac_vidioc_g_chip_info,
+#endif
};

static struct v4l2_clk_ops pxa_camera_mclk_ops = {
--
2.1.4